
If you want to venture on fantasy m/m novels instead because there is a lack of fantasy yaoi manga, there's a lot out there and even without the pictures, your imagination is enough I assure you. I started with Megan Derr and Sasha L. Miller and their group of authors in Less Than Three Press. I also like Eresse and her Chronicles of Ylandre series though there's only half of the planned books published. You can also find more authors if you search through goodreads. So basically, when I first felt that there was not enough yaoi, I turned to m/m books and expanded my fujoshi perspective LOL.

I also higly recommend Wattpad Rotty's Underworld Chronicles. It's freaking awesome. You're gonna be in for a ride. Anyway, there's a lot of fantasy genres in m/m novels that can satisfy you and relieve your frustrations on the lack of it in yaoi mangas.

Seems like you've read quite a lot, so you probably already read this, even though its shounen-ai. i recommend re-reading it to tide you over. koori no mamono no monogatari b http://www.mangago.zone/read-manga/koori_no_mamono_no_monogatari/
Anyone know of any multi-volume fantasy BL mangas to tide us over until the next chapter?